owens



y J. B.. 0w^E-Ns AND E. P. OGDEN. L C'OMBUSTION CHAMBER FOR TUNNEL KILNS.

,APPLUl'cmoN man mums. 1920.

" Igatented May 1.7, 192,1.

JOHN B. OWENS, OF ZANESVILLE, AND ELLSWORTH P. OGDEN, OF

SAID OGDEN ASSIGNOR TO SAID OWENS.

PATENT OFFICE.

COLUMBUS, OHIO COMBUSTION-CHAMBEB FOB, TUNNELKILNS.

Original application led May 28, 1918, Serial No. 237,166. Divided and this 1920. vSerial No. 391,637.

To all whom 'it may concer-n:

Be it known that we, JOHN B. OwnNs and ELLswoR'rH P. OGDEN, citizens of the United States, residing, respectively, at Zanesville, county of Muskingum, State of Ohio, and Columbus, in the county of Franklin and State of Ohio, have invented certain new and useful Improvements in Combustion- Ohambers Jfor Tunnel-Kilns, of which the following is a specification.

In earlier applications of John B. Owens, instances of which are Serial Nos. 144,071;

237,166, 249,827; 251,294E and 277,718, there are disclosed and claimed the principles ot' longitudinal tiring in combustion chambers for tunnel kilns and baiiles which deflect the heat and products of combustion from the combustion chambers intothe tunnel. The objects have been, generally stated, to evolve a maximum number of thermal units in the combustion chambers and to so discharge the thermal units and products of combustion onto the ware or goods being burned in the tunnel as to minimize uneven burning and to insure an even firing of the ware at different points'of the height of the Stack of ware carried by the cars or other conveyers which convey the ware through the tunnel. f

Our present improvements relate to combustion chambers for tunnel kilns and, more particularly, to battles or walls for said combustion chambers for the purpose of directing the thermal units and products of combustion to the ware on the cars in such manner that an even tiring of the warewill Heretofore despite all precautions such accidents have happened, resulting in con gestion of the kiln and the combustion chambers and requiring a shut-down.

Our present improvements overcome the defects in question and provide Whatis, in effect, relatively closed faces for the combustion chambers where they face the tunnel and yet full provision is made for passage of the thermal units and products of com- Specication of VLetters Patent.

' perforations and built Patented May 17, 1921.

application filed June 25,

' bustion through the battles in such manner that an even tiring of the ware is obtained. In .application Serial No. 237,166 it is explained that the depending baffles for the combustion chambers may be provided with as checker work. In that application is also shown piers supporting the depending baffle wall and dividing the space below the lower edge thereof into p orts or openings, whose number may be varied as desired, through which the heat and products of combustion flow to the ware in the tunnel. V

The present application is, therefore, as to the above features broadly considered, a division of application Serial No. 237,166, filed May 28, 1918, and we have disclosed herein certain additional and improved features constituting novel subject-matter.

In `the accompanying drawings, Y

lgul'e l is a. horizontal section on line 1-1 of Fig. 2 taken through one part of the combustion chambers of a tunnel kiln according to the present invention;

1g. 2, a vertical section on line 2-2of Fig. 1, and Y Y Fig. 3, a view looking toward the inner tace oi the combustion chamber which opens into the interior of the tunnel, the tunnel appearing in longitudinal section.

We have illustrated only one pair of Vop'- positely` disposed combustion chambers but it is to be understood that our invention may be carried out in connection with any number of pairs of combustion chambers as, for instance, it may be used in connection with the combustion chambers of a tunnel kiln having a multiple tiring Zone using two, three, four or greater number combustion chambers.

A portion of the tunnel of the kiln appears at 1 and a pair of oppositely disposed combustion chambers arejshown at' 2, 2. These chambers may be fired in any desired manner and by the use of any preferred fuel, but we have shown openings at 3 and 4, respectively, in the ends of the chambers for the introduction of fuel andair which will be directed longitudinally of the.combustion chambers to carry out the principle of longitudinal tiring which is fully explained in earlier applications, the serial numbers of some of which are hereinbetore recited; The chambers may be fired longitudinally from both ends ii desired.

oi' pairs of The rails are shown at 5 and one of the cars bearing ware appears at 6, the ware being illustrated at 7.

The car platform is substantially level with the bottoms S of the combustion chamv bers.

' by piers 11 vof which there may be as many as desired, say Vfive or six, and ofV any desired height. Vile do not limit ourselves to the vertical height of the baffles 9 nor to the height of the piers 11, nor to their num-V ber, norto the size, and precise direction of delivery through, the openings or ports 12 between the piers.

A baille supported by piers with ports between the piers for delivering the heat and products of combustion from the combustion chambers into the tunnel, is shown and described in application Serial No. 237,166, filed May 28, 1918. That application also describes a balile, such as shownat 9, which is. provided with perfor-ations for the passage of the heat and products of combustion therethrough, and it is stated in said Vapplication that `the baille may be built of checker work. In so far as there is shown and disclosed herein azbaflle 9, piers 11 and ports 12 which are similar in general rangement and function to the disclosures of application Serial No.v 237,166, we claim said subject-.matter to constitute a division of f tion.

to how the baiiie 9 is formed for the purpose Y Veo said application Serial No. 237,166. In addition to the foregoing features, we provide in the face of the baille 9 where it faces the interior of the tunnel, ports13.

These ports receive the Vheat and products of combustion from the upper part of the com bustion chamber through a single long flue 14 which opens into the upper part of the combustion chamber at 15. The flue 15 may be of any width considered vertically, and it also extends the full length of the combustion chamber. The exactV point where the mouth 15 opens into the combustion chamber is not of the essence of the inven- N or is it essential to our invention as of providing the flue 1li, mouth 15, and discharge ports 13.

Our improvements provide for the baffling and retardation of the heat and products of combustion and insure that they be directed toward the middle and lower portions of the stack Vof ware?. The heat and products of combustion thus are disseminated upwardly throughout the staclr of ware'7 instead of being concentrated on the upper portion of the ware as would be the case were the baffle not used, The provision of the ports 12 and,

13 insures that the heat and products of combustion be subdivided into numerous streams which tend to cause even firing instead of the heat being concentrated on certain points of the stack 7.

ln our invention it is immaterial whether the ports 12 and 13 are arranged to direct the heat and products of combustion substantially at right angles to the length of the tunnel or are arranged on an incline to direct the heat and products of combustion angularly to the length of the tunnel.

Our improvements provide, in substance, a wall for the inner face of the combustion chamber and, consequently, should the heat cause the stack of ware to sag or cave in, due to concentration of heat on a. particular part of t-he stack, the ware will simply brush against the baille and the piers and not fall into the combustion chamber, thereby overcoming a serious defect heretofore existing in tunnel kilns.

What we claim is:

1. A tunnel lriln having a combustion chamber at its side, a baille for the upper part of the combustion chamber where the latter faces the interior of the tunnel, and piers supporting said baiifle, said piers being separated by discharge ports or passages through which the heat and products of combustion pass from the combustion chamber to the interior of the tunnel, -said baille being provided with portshwhich open into the interior of the tunnel at the lower portion of said baiile and communicate with the combustionV chamber in the upper portion thereof..

2, A tunnel kiln having a combustion chamber at its side, and a baille depending from the upper portion of the combustion chamber where it faces the interior of the tunnel, said baille being provided with ports which communicate with the tunnel at the lower portion of the baffle and communicate with the combustion chamber at the upper portion of the latter.

3. A tunnel kiln having combustion chambers atV its sides, an arch constituting the crown of the tunnel and the walls of said combustion chambers, baffles depending from said arch for said combustion chambers, said combustion chambers being in communication with the interior of the tunnel through a plurality of diving passages, ports or openings in the bafiies which are arranged to deliver the heat and products of combustion from the upper parts of the combustion chambers to the middle and lower portions of the stacks of ware being conveyed through the tunnel. Y

In testimony whereof we aiiix our signatures.

Jona B. ownns. ELLSWORrH P. OGDEN. 

